Metal-oxide solid solutions for light alkane sensing

Carotta, M.C.; Cervi, A.; Giberti, A; Guidi, V.; Malagù, C.; Martinelli, G.; Puzzovio, D.

doi:10.1016/j.snb.2008.03.012

Cited by 28 publications

(21 citation statements)

References 14 publications

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“…The thickness of the sensing layers is about 30 m (thick film sensors) and they were obtained by screen-print pastes synthetized from these powders (by adding a proper amount of organic vehicles) onto miniaturized alumina substrates equipped with pre-deposited electrodes and the heater [12]. The gas sensing measurements were performed by means of the flow-through technique [13][14][15].…”

Section: Sensors Propertiesmentioning

confidence: 99%

Detection of colorectal cancer biomarkers in the presence of interfering gases

Zonta

Anania

Fabbri

et al. 2015

Sensors and Actuators B: Chemical

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Medical studies have shown that tumor growth is accompanied by protein changes that may lead to the peroxidation of the cell membrane, with consequent emission of volatile organic compounds (VOCs). VOCs can be detected through breath or intestinal gases and are biomarkers for colorectal cancer (CRC). The analysis of VOCs represents a non-invasive and potentially inexpensive pre-screening technique. An array of chemoresistive gas sensors, based on screen-printed Metal OXide (MOX) semiconducting films, has been selected to identify gaseous compounds of oncological interest, i.e. benzene, 1-iodo-nonane and decanal, from the main interferers that can be found in the intestine. MOX sensors are able to detect concentrations down to about 10th ppb, as experimentally proven in previous works, so they can identify very slight differences in concentration among gas mixtures. In this work it has been proven that the array used is able to identify tumor markers singularly and in combination with other gases both in wet and dry conditions. Moreover, the sensors chosen can discriminate target VOCs from interferers even at low concentrations

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Section: Sensors Propertiesmentioning

confidence: 99%

Detection of colorectal cancer biomarkers in the presence of interfering gases

Zonta

Anania

Fabbri

et al. 2015

Sensors and Actuators B: Chemical

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“…• C. In general, the response of the sensors versus alkanes increases with the number of carbon atoms and with temperature [89,90]. This behavior is explained through alkane oxidation via heterogeneous catalysis of metal-oxide materials [85][86][87].…”

Section: Nanocrystalline Metal Oxide-based Methane Sensorsmentioning

confidence: 99%

Nanocrystalline Metal Oxides for Methane Sensors: Role of Noble Metals

Basu

2009

Journal of Sensors

130

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Methane is an important gas for domestic and industrial applications and its source is mainly coalmines. Since methane is extremely inflammable in the coalmine atmosphere, it is essential to develop a reliable and relatively inexpensive chemical gas sensor to detect this inflammable gas below its explosion amount in air. The metal oxides have been proved to be potential materials for the development of commercial gas sensors. The functional properties of the metal oxide-based gas sensors can be improved not only by tailoring the crystal size of metal oxides but also by incorporating the noble metal catalyst on nanocrystalline metal oxide matrix. It was observed that the surface modification of nanocrystalline metal oxide thin films by noble metal sensitizers and the use of a noble metal catalytic contact as electrode reduce the operating temperatures appreciably and improve the sensing properties. This review article concentrates on the nanocrystalline metal oxide methane sensors and the role of noble metals on the sensing properties.

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“…However, very few studies can be found in literature about this application of CdS. The majority of scientific papers regarding conductometric gas sensors are focused on metal oxides [6][7][8][9][10][11][12][13], even though there are other classes of materials that show chemoresistive properties [14].…”

Section: Introductionmentioning

confidence: 99%